MP8904DD-Z [MPS]
Adjustable Positive LDO Regulator, 0.5V Min, 5V Max, PDSO8, 2 X 3 MM, MO-229VCED-2, QFN-8;
| 型号： | MP8904DD-Z |
| 厂家： | 
MONOLITHIC POWER SYSTEMS |
| 描述： | Adjustable Positive LDO Regulator, 0.5V Min, 5V Max, PDSO8, 2 X 3 MM, MO-229VCED-2, QFN-8 光电二极管 输出元件 调节器 |
| 文件： | 总10页 (文件大小：371K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MP8904
500mA Linear Regulator
The Future of Analog IC Technology
DESCRIPTION
FEATURES
•
•
•
•
•
•
Power Good Open Collector Output
The MP8904 is a low-current, low-dropout
linear regulator operating over a single input
supply between 2.5V to 6.5V. The output
voltage of the MP8904 is adjustable via an
external resistor divider. The MP8904 can
supply up to 500mA of load current. The enable
pin (EN) allows the part to be put into a low
current shutdown mode (EN=0). The MP8904
features thermal overload and current limit
protection. It is available in an 8-pin QFN (2mm
x 3mm) package
Operates from 2.5V – 6.5V Input
Low 300mV Dropout at 500mA Output
Stable with Very Small Ceramic Capacitors
2% Feedback Reference
Adjustable Output Voltage Option from 0.5V
to 5V using an External Resistor Divider
Better Than 0.001%/mA Load Regulation
Stable With Low-ESR Output Capacitor
Low 100µA Ground Current
•
•
•
•
•
•
Internal Thermal Protection
Current Limit Protection
6µA Typical Quiescent Current at Shutdown
APPLICATIONS
•
•
•
Low Current Regulators
Battery Powered Systems
Cellular Phones
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“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
8
1
V
IN
OUT
IN
V
OUT
R1
R2
MP8904
5
3
4
FB
EN
PG
5V
GND
6
Power Good
MP8904 Rev. 1.0
3/11/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
1
MP8904 –500mA LINEAR REGULATOR
ORDERING INFORMATION
Part Number*
Package
Top Marking
Free Air Temperature (TA)
QFN8 (2mm x 3mm)
MP8904DD
T3
-40°C to +85°C
* For Tape & Reel, add suffix –Z (eg. MP8904DD–Z)
For RoHS Compliant Packaging, add suffix –LF (eg. MP8904DD–LF–Z)
PACKAGE REFERENCE
TOP VIEW
OUT
NC
PG
FB
1
2
3
4
8
7
6
5
IN
NC
GND
EN
EXPOSED PAD
ON BACKSIDE
CONNECT TO GND
Thermal Resistance (4)
QFN8 (2mm x 3mm) ...............55 ...... 12...°C/W
θJA
θJC
ABSOLUTE MAXIMUM RATINGS (1)
IN, FB to GND.................................-0.3V to +7V
EN to GND.............................-0.3V to VIN +0.3V
OUT ......................................-0.3V to VIN + 0.3V
Notes:
1) Exceeding these ratings may damage the device.
2) The maximum allowable power dissipation is a function of the
maximum junction temperature TJ(MAX), the junction-to-
ambient thermal resistance θJA, and the ambient temperature
TA. The maximum allowable continuous power dissipation at
any ambient temperature is calculated by PD(MAX)=(TJ(MAX)-
TA)/ θJA. Exceeding the maximum allowable power dissipation
will cause excessive die temperature, and the regulator will go
into thermal shutdown. Internal thermal shutdown circuitry
protects the device from permanent damage.
Continuous Power Dissipation
(TA = +25°C)(2)
……………………………………………….2.5W
Junction Temperature...............................150°C
Lead Temperature ....................................260°C
Storage Temperature .............. -65°C to +150°C
Recommended Operating Conditions (3)
Input Voltage VIN .............................2.5V to 6.5V
Output Voltage...................................0.5V to 5V
Load Current...........................500mA Maximum
Maximum Junction Temp. (TJ)............... +125°C
3) The device is not guaranteed to function outside of its
operating conditions.
4) Measured on approximately 1” square of 1 oz copper.
MP8904 Rev. 1.0
3/11/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
2
MP8904 –500mA LINEAR REGULATOR
ELECTRICAL CHARACTERISTICS
VIN = 3.3V, VOUT = 1.2V, COUT = 4.7µF, CIN = 2.2µF, TA = +25°C, unless otherwise noted.
Parameter
Operating Voltage
Symbol Condition
Min
2.5
Typ (4)
Max
6.5
Units
V
µA
mA
µA
IOUT = 1mA
I
OUT = 1mA (6)
100
5
7
Ground Pin Current
Shutdown Current
FB Regulation Voltage
Dropout Voltage (7)
Line Regulation
IOUT = 500mA
VEN = 1.45V, VIN = 5V
0.484 0.496 0.508
0.481 0.496 0.510
300
V
-40°C ≤ TA ≤ +85°C
IOUT = 500mA
mV
%/V
I
OUT = 1mA,
VIN = (VOUT + 0.5V) to 6.5V (7)
OUT = 1mA to 500mA,
0.005
0.001
0.5
I
Load Regulation
%/mA
V
VIN = VOUT + 0.5V
Power Good Output Voltage
Low(8)
VOL
Isink = 5mA
EN Input High Voltage
EN Input Low Voltage
EN Input Bias Current
Thermal Protection
1.2
V
V
0.4
VEN = 1.5V, 5V
0.01
155
730
1
µA
°C
mA
Current Limit
550
Notes:
5) Parameter is guaranteed by design, not production tested.
6) Resistors for VOUT measurement are 10kΩ, 14kΩ, 1%
7) The ground current does not include current through feedback current
8) Dropout Voltage is defined as the input to output differential when the output voltage drops 1% below its nominal value
9) VFEEDBACK is 90% of the regulated value with 10kΩ pull-up to 5V
MP8904 Rev. 1.0
3/11/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
3
MP8904 –500mA LINEAR REGULATOR
TYPICAL PERFORMANCE CHARACTERISTICS
C1=2.2µF, C2 =4.7µF, C3=1nF, TA = +25°C, unless otherwise noted. (Reference Figure 2)
Voltage Dropout vs Current
Line Regulation
Load Regulation
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.61
0.60
0.59
0.58
0.57
0.56
0.63
0.62
0.61
0.60
0.59
0.58
V
=2.5V
IN
V =1.8V-3.3V
O
100
200
300
400
500
2.5
3
3.5
4
4.5
5
5.5
0
100
I
200
300 400 500
V
VOLTAGE (V)
CURRENT (mA)
I
CURRENT(mA)
IN
LOAD
LOAD
Line Regulation
Load Regulation
85 °C Load Regulation
1.808
1.804
1.800
1.796
1.792
1.788
1.82
1.81
1.80
1.79
1.78
1.77
1.83
1.82
1.81
1.80
1.79
1.78
V
=2.5V
IN
V
=2.5V
IN
V
=5V
IN
V
=3.3V
IN
100 200 300 400 500 600
CURRENT (mA)
2.5
3.0
3.5
4.0
4.5
5.0
0
100
I
200
300 400
500
INPUT VOLTAGE (V)
CURRENT (mA)
I
LOAD
LOAD
Line Regulation
Load Regulation
-40 °C Load Regulation
1.83
1.82
1.81
1.80
1.79
1.78
3.83
3.32
3.3
3.33
3.32
3.31
3.30
3.29
3.28
3.30
3.29
3.28
0
V
=5V
V
=3.3V
IN
IN
V
=3.6V
IN
V
=2.5V
IN
0
100 200 300 400 500 600
CURRENT (mA)
3.5
3.9
4.3
4.7
5.1
5.5
0
100
I
200
300 400
500
INPUT VOLTAGE (V)
CURRENT (mA)
I
LOAD
LOAD
MP8904 Rev. 1.0
3/11/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
4
MP8904 –500mA LINEAR REGULATOR
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
C1=2.2µF, C2 =4.7µF, C3=1nF, TA = +25°C, unless otherwise noted. (Reference Figure 2)
Supply Current vs.
Input Voltage
Shut Down Current
vs. Input Voltage
Line Transient
V
= 2.5V to 3.5V, V = 1.8V, V = V ,
EN IN
IN
O
I
= 50mA, with Resisitor Load
LOAD
170
160
150
140
130
120
10
9
V
IN
0.5V/div.
8
V
O
7
50mV/div.
6
5
2 ms/div.
1
2
3
4
5
6
1
2
3
4
5
6
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
PSRR vs Frequency
VFB vs Temperature
Load Transient
V
I
= 2.5V, V = 1.8V, V = V ,
EN IN
IN
O
V
=2.5V, V =V =1mA
I
= 50 to 300mA, with Resistor Load
IN EN IN, LOAD
LOAD
90
80
70
60
50
40
30
20
10
0
495.0
494.5
494.0
V
O
100mV/div.
493.5
493.0
492.5
I
LOAD
0.2A/div.
492.0
400µ s/div.
0.1 1.0
10
100 1000 10000
-50
-20
10
40
70
100
FREQUENCY (Hz)
TEMPERATURE (C)
Enable Turn On
Enable Turn Off
Thermal Protection
V
I
= 3.3V, V = 1.8V,V = 0V - 2V,
EN
= 200mA, with Resisitor Load
V
I
= 3.3V, V = 1.8V,V = 2V - 0V,
EN
= 200mA, with Resisitor Load
V
V
= V = 5V,
EN
IN
O
IN
O
IN
O
= 1.8V, I
= 0.5A
O
O
LOAD
EN
V
2V/div.
IN
V
EN
2V/div.
1V/div.
PG
V
O
5V/div.
0.5V/div.
V
O
1V/div.
V
O
1/div.
V
PG
V
PG
0.2A/div.
0.2A/div.
I
I
LOAD
I
LOAD
LOAD
0.2A/div.
0.1A/div.
0.5/div.
100µ s/div.
1ms/div.
400µ s/div.
MP8904 Rev. 1.0
3/11/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
5
MP8904 –500mA LINEAR REGULATOR
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
C1=2.2µF, C2 =4.7µF, C3=1nF, TA = +25°C, unless otherwise noted. (Reference Figure 2)
Short Circuit Recovery
Short Circuit Protection
V
= 4V, V = 1.8V, V = V
IN EN
V
= 4V, V = 1.8V, V = V
EN IN
IN
O
IN
O
PG
2V/div.
PG
2V/div.
V
O
V
O
1V/div.
1V/div.
I
I
LOAD
LOAD
1A/div.
1A/div.
MP8904 Rev. 1.0
3/11/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
6
MP8904 –500mA LINEAR REGULATOR
PIN FUNCTIONS
Pin #
Name
Description
Regulator Output. OUT is the output of the linear regulator. Bypass OUT to GND with
a 4.7µF or greater capacitor.
1
OUT
NC
PG
No connect.
2
3
Power Good Open Collector Output
Feedback Input. Connect a resistive voltage divider from OUT to FB to set the output
voltage. OUT feedback threshold is 0.5V.
Enable Input. Drive EN higher than 1.2V to turn on the MP8904, drive EN lower than
0.4V to turn it off.
FB
EN
4
5
GND
Exposed
Pad
The exposed pad and GND pin must be connected to the same ground plane.
6
NC
No connect.
7
8
Power Source Input. IN supplies the internal power to the MP8904 and is the source
of the pass transistor. Bypass IN to GND with a 2.2µF or greater capacitor.
IN
OPERATION
The MP8904 is a low-current, low-voltage, low-
dropout, linear regulator. It is intended for use in
devices that require very low voltage, low
quiescent current power such as wireless
modems, pagers, and cellular phones.
The MP8904 uses a PNP pass element and
features internal thermal shutdown and internal
current limit circuit.
OUT
V
OUT
V
IN
8
1
4
THERMAL
PROTECT
C1
R1
R2
FB
--
+
C2
5
+
--
0.5V
REF
EN
6
3
PG
R3
GND
5V
PG
Figure 1—Block Diagram of Ultra Low Noise Adjustable Output Regulator
MP8904 Rev. 1.0
3/11/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
7
MP8904 –500mA LINEAR REGULATOR
APPLICATION INFORMATION
Setting the Output Voltage
The MP8904 has an adjustable output voltage,
set via an external resistor divider (R1 and R2
in Figure 2).
Table 1—Adjustable Output Voltage R1 Values
(R2=10kΩ)
VOUT (V)
1.25
1.5
1.8
2
R1 (Ω)
15k
20k
26k
30k
40k
46k
50k
56k
70k
90k
⎛
⎜
⎜
⎝
⎞
⎟
⎟
⎠
VOUT − VFB
R1 = R2×
VFB
where VFB = 0.5V, is the OUT feedback
threshold voltage.
2.5
2.8
3
Example: For 2.5V Output and R2=10kꢀ
2.5 − 0.5
⎛
⎜
⎞
⎟
R1 = 10k ×
= 40k
3.3
4
0.5
⎝
⎠
A standard 40kꢀ (±1%) resistor can be selected
for R1.
5
Bypass Capacitors
Table 1 lists the selected R1 values for some
typical output voltages (assuming R2 = 10kꢀ).
For lower noise, the reference voltage can be
bypassed by an external capacitor. A low ESR
capacitor, such as the ceramic type, will provide
the best performance.
PG
The power good pin is an open collector output
a pull up resistor (10kꢀ recommended). The
pull up resistor can be tied to a supply within
the voltage range of then pin (0 to 5.5V). for
example, the pull up resistor can be tied to the
input voltage when it is being monitored by an
IC powered from this input voltage. It is mornitor
the output voltage, if the output voltage is 10%
below its regulation point, the PG pin becomes
low.
TYPICAL APPLICATION CIRCUIT
8
1
V
IN
OUT
IN
1.8V
C3
1nF
MP8904
5
3
FB
EN
PG
4
GND
6
PG
Figure 2—Typical Application Circuit
MP8904 Rev. 1.0
3/11/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
8
MP8904 –500mA LINEAR REGULATOR
2) Ensure all feedback connections are short
and direct. Place the feedback resistors and
compensation components as close to the
chip as possible.
PCB layout guide
PCB layout is very important to achieve good
regulation, ripple rejection, transient response
and thermal performance. It is highly
recommended to duplicate EVB layout for
optimum performance.
3) Connect IN, OUT and especially GND
respectively to a large copper area to cool
the chip to improve thermal performance and
long-term reliability.
If change is necessary, please follow these
guidelines and take figure 3 for reference.
1) Input and output bypass ceramic capacitors
are suggested to be put close to the IN Pin
and OUT Pin respectively.
8
V
OUT
OUT
V
IN
IN
R1
R2
5
EN
4
MP8904
R3
FB
C2
C1
PG
GND
6
C2
OUT
IN
IN
1
2
3
4
8
OUT
NC
NC
7
6
5
R1
R2
C3
GND
EN
PG
FB
R3
C1
GND
Top Layer
Figure 3—PCB Layout
MP8904 Rev. 1.0
3/11/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
9
MP8904 –500mA LINEAR REGULATOR
PACKAGE INFORMATION
QFN8 (2mm x 3mm)
PIN 1 ID
SEE DETAIL A
2.90
3.10
0.30
0.50
1.65
1.85
PIN 1 ID
MARKING
0.18
0.30
8
1
1.90
2.10
1.50
1.70
0.50
BSC
PIN 1 ID
INDEX AREA
4
5
TOP VIEW
BOTTOM VIEW
PIN 1 ID OPTION B
R0.20 TYP.
PIN 1 ID OPTION A
0.30x45”TYP.
0.80
1.00
0.20 REF
0.00
0.05
SIDE VIEW
DETAIL A
2.90
NOTE:
0.70
1.70
1) ALL DIMENSIONS ARE IN MILLIMETERS.
2) EXPOSED PADDLE SIZE DOES NOT INCLUDE MOLD FLASH.
3) LEAD COPLANARITY SHALL BE 0.10 MILLIMETER MAX.
4) DRAWING CONFORMS TO JEDEC MO-229, VARIATION VCED-2.
5) DRAWING IS NOT TO SCALE.
0.25
0.50
1.60
RECOMMENDED LAND PATTERN
NOTICE: The information in this document is subject to change without notice. Users should warrant and guarantee that third
party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not
assume any legal responsibility for any said applications.
MP8904 Rev. 1.0
3/11/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
10
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